Command Early Warning Net - San Diego

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CEWN system for San Diego is found on:

328.200 - SOPA SUBAREA EAST ADMIN Net Control (AM)

This is the sole radio net monitored by ships in port at anchor for
warnings or notifications of incoming message traffic at the shore
communications station for them. If there's a threat warning to be
given, it goes here.

Alternate frequency:

342.600

You may find these in use in other areas, as well.

 

[SkipSanders]

Just to update, this frequency/net (328.2) is still active in San Diego. It also used to be the same net in Long Beach, but I don't know if it still is.

Most active at around 8 AM, when the net control runs a check on all stations to determine they are monitoring.

Net Control is 'SOPA SubArea East'

You might find the station check interesting, since you should hear every Naval Vessel in the area check in.

This net is the only radio net monitored (normally) by US Navy vessels while in port, and is used to notify them that they have message traffic to be picked up (by phone or messenger) at the local message center, or, for warnings to vessels of threats.

If there's a terrorist threat to the area or vessels specifically, it will be broadcast here. If there's a nuclear war threat, same.

Usually low traffic, of little interest, something to put in a secondary scanner... but if something happens, it might just be your first warning of major activity to come.